Electric distant-control system



May 19, 1925. 1,538,546

E. GRANAT unncwnxc DISTANT CONTROL sYsrsu Filed Jan. 29, 1923 '7 Sheets-Sheet 1 I E. GRANAT ELECTRIC msnur common srs'ru Filed Jan. 29, 1923 v SheeFs- Sh'eet 2 E.'GRANAT ELECTRIC DISTANE CURTRGE} SYSTEM May 19, 1925. 1,538,546

Filed Jan. 29, 1923 7 Sheets-Sheet 4 E. GRANAT ELECTRIC DISTANT CONTROL SYSTEM Filed Jam 29. 1923 'r Shasta-Sheet s I02 I E F I x X 1/2 IJ: D

-. May 19, 1925. 1,538,546

. E. csR NA-r ELECTRIC DISTANT CONTROL SYSTEM Filed Jan. 29. 1923 V 7 Sheets-Sheet s.

E. GRANAT ELECTRIC DISTANT CONTROL SYSTII Filed Jan. 29, 1923 7 Shets- Sheet 1 May 19, 1925. 1,538,546

Fly. 4. I

close coincidence as to time and Patented May 19, 1925.

ELIE GRANAT, OI PARIS, FRANCE.

ELECTRIC DIST ANT-CONTROL SYSTEM. I

Application filed January 29, 1928. Serial 170. 615,777.

To all whom it may concern:

Be it known that I, ELIE GRANAT, citizen of the French. Republic, residing at 10 Rue Caumartin, Paris, France, have invented certain new and useful Electric .Distant- Control Systems, of which the following is a specification.

My invention relates to an electric distant control system wherein a transmitting device which may have but a small power is moved in order to produce a like motion in a receiving device operating with great power, this being performed in such manner that the two devices will be in very space, whereby each position of the said transmitter shall correspond to a single predetermined osition ofthe receiver, the concordance of these two positions being exactboth while operating and when the apparatus is stopped.

The principle stated as follows:

The transmitting station com rises the transmitter of a synchronized (evice for electric control termed distant control transmitter, which is connected to a line known as distant control circuit. said circuit is connected a controlled electric receiver which controls the voltage variations of a generator having a variable voltage; the said voltage will thus depend at each instant upon the operating speed of the transmitter. The said variable voltage generator supplies the motor which drives of the invention may be the receiving or actuated element: the said motor 1s separately excited and is supplied at a variable voltage, and it drives the actuated element at a speed which is substantially proportional to this voltage and will therefore depend practically upon thespeed of the said transmitter. The operation of the switch for starting in the'proper direction and stopping said motor, and of the excitation rheostat for the regulation of its speed, is carried on by means of a differentlal device which is actuated first by a synchronous controlled receiverconnected to the said distant control circuit, and secondly by the movement of the receiving member.

The-resulting motion of the differential device is transmitted to a shaft provided with cams adapted to o erate suitable contacts so as to sup ly t e motor actuating the said receiving device with current in the ceivmg station.

To the reg uired direction as soon as there is any d1 erence of position between the part of the differentia operated by the motion of the receiver and the other part operated by the said controlled motor. The said shaft also controls the field rheostat of the motor so as to correct the speed of the receiver as controlled by the transmitter in order to obtain an exact control.

The following description, together with the accompanying drawings which are 'ven by way of example, sets forth an em diment of the said system of distant control which serves for the simultaneous aiming in direction of various cannon on shipboard by the simple operation of a hand wheel or of the telescopic sight of the central firing stat-ion.

Figs. 1 and 1 constitute a diagrammatic general view of the installation.

Figs. 2, 2, 3, 4, 4 and 5 are views showing further details.

Figs. 2 and 2' shew the transmitting stations. Fig. 3 shews the variable voltage generator. Figs. 4 and 4 represent a re Fig. 5 shews a transmitting station which is operated by the telescopic sight. The general installation lowing:

1-A main transmitting station A which is located at the central firing station, and various secondary transmitting stations A etc., located for instance comprises the 'foltower of the forward or rear bridge, or like Each station comprises an electric transmitter for distant control 1, 1. The transmitter of the station in service supplies a distant control circuit D through the medium of a switching device 2.

machine room B containing the elec tric motor 3 which drives a variable voltage nerator 4; this group is controlled by a istant control receiver 5 mounted upon the said circuit D so that the voltage variations of the said generator shall follow the speed variations of the transmitter 1; the said generator supplies the variable voltage line F F.

3-Receiving stations C. C etc. (one for each cannon) each comprising a motor22 mounted upon the circuit F and actuating the operating elements of the corresponding cannon. The motor 22 is made to run in the proper direction, stopped, or corrected for speed according to the distant control system b means of a differential device '31 34 w ereof the part 34 is connected with the'cannon and the other part 31 is actuated b a controlled receiver connected to the distant control circuit D."

' The main transmitting station 1 A com-'- rises a distant control transmitter 1 which 1n the present exam le in constructed according to the escribed in applicants French Patent 1921 entitled: Electric distant control system.

mitter is therein constituted b which is equipped as an auto-synchronous motor; its stator is supplied by the said poly base current of variable uency whlc produces therein a rotating fiel having the same rate of rotation as the set of movable brushes, of -the transmitter; the

rotor of the device has a closed circuit winding and is supplied with continuous current at two opposite fixed points-on the closed winding, so that it will act as a magnet which follows the rotation of the field. The rotor will thus be very exactly controlled (as. to time and space) by the set of mova'bl brushesof the transmitter.

The transmitter 1 of the station A, Fig. 1, supplied a distant control circuit ID, having thereupon the various controlled. receivers which will be further described: thesupply is efiected through a general, switching devlce or permutator v2 so that any one of the transmitters 1, 1. etc, isenabled. to supply all the transmitting stations A, A etc.

The machine room Bcomprises'a constant voltage motor 3 supplied by the ships circuit E and actuating a variable voltage generator 4 which supplies the variable voltage lines F, F;

The control of the voltage of the generator 4 by the operating speedof the transmitter 1 is carried out in the following manner: To the distant control circuit D is connected a controlled receiver 5 (for example of the type described in the above-mentioned patent) which drives one of the gear wheels 6 of a differential whereofthe second gear t P o. 540,353 of January 14th,

It will be remembered that the trans a receiving electric machine having-a fixe field, Fig. 2.

and a movable armature whose commutator trolled (in time and A corresponding receiver is employed wheel. 7 is drivenby a motor 8 whose armature receives current from the variable voltage line F at the points 11 and 12 through the reversing and switching device 13'; t separately excited circuit of said motor is connected to the shi s circuit E. at the points 9 and 10. A eld-rheostat 14 serves to'regu'late the s d of the motor 3, and a rheostat 1-5 reguates the excitation of the generator 4; by means of said rheostats the voltage of the generator 4 can be variedv within- .wide limits and in. a continuous manner. .The fixed parts of the switching device 13 and of the rheostat 14 and 15 are disposed about the shaft 16 mounted u n the planetery gear set 17, 18, of the ifferential 67 said shaft carries the arms 19, 20, 21 used tooperute theelements 13, 14, 15 respectively.

. The said device operates as follows:

- The controlled motor 5 connected to the distant "control circuit Dis exactly conof the transmitter 1. en the 6* and 7 of said differential whic are actus ace) by the motion" 1gb r wheels ated respectivelyby the motor 5 and by the I motor 8 .which is supplied by the variable voltage circuit (whose speed at each instant will thus be roportional to the voltage of this circuit are caused to change their relative position for any reason, the planetary gear set17, 18 will be made to rotate, and the arm 19 of the shaft 16 will operate the switch 13 so as to start the motor 8 in the proper direction and to stop the same as desired.

The speed of the motor 8 is pro rtional to the variable voltage of the line supplying the .same. The arms 20 and 21 of the shaft 16 v will act. respectively upon the rheostats 14 and 15 so as to increase the voltage of the generator 4 until the s of rotation of the motor 8 shall be equal to I that of the motor 5 whereby the variable voltage of the current produced bv the generator 4, and supplying the lines F, F, shall depend exactly upon the speed of the transmitter 1.

A receiving station 0 is provided with the following elementsz'The main controlling motor 22 which drives (through the electromagnetic clutch 23) a pinion 24- co-operating-with the traversing rack 25 for aiming the cannon in direction; 'The said motor is su'ppliedby the variable voltage line F by means of a circuit connected at the points 26, 27 and containing a reversing switch;

and the field of the motor is supplied bv the ships circuit at the points28. 29. When the saidmotor receives current it will rotate at a speed which is proportional to the variable (and controlled)) voltage of the line F and hence at the samespeed as the transmitter ,1. In order to provide for the operation of said motor in either direction and steam for the motor, according to the in arrangem' "ent is used:

controlled receiver 30 is connected to the-distant control circuit D and-itrotates a sleeve 31 carrying the lanetary gear set movements of 'the transmitter 1, the'fo llow 82, 33- of a difl'erential w ose outer toothed 'proper direction ring 34.. is actuated (through anelectro-. magnetic clutch 35) by a imon 36 which 19 driven b the rack teeth 3 of the gun platform. e,central pinion 38 of said 11f? ferential is keyed to a shaft-39fupon which are mounted the various elements for o erating the motor 22 as to starting mt e the speed. The detai s of said elements will be further set forth, but the following is a summary description. The shaft 39 earfries two cams 40, 41 of a reversing and switching device for operating; 1

the main controlling motor 22 in either making contact between the switch stu s 42, 43 (connected with the motor brushes) and studs 44, 45 or 46, 47 which are res ctively connected tothe lines .26, 27 of th: variable voltage circuit F. The shaft 39 has also mounted thereon the two cams 48, 49 for breaking. the supply circuit of. the motor 30 and therefore of the inain motor 22 when the cannon attains the limits of lateral aiming-in its field of fire. On the shaft 39 are also'mounted two safety .cams 50, 50' which act simultaneou ly.

effect an additional breaking of the sup ply circuit of the clutches 23 and 85 so that. if for any reason the sup ly of the main motor 22 should not have cannon-would not be-actuated. m

The principal combinations of the system havin been thus set forth, a detailed deflcscription will be given hereunder of an arrangement which is particular to this' sys tem. ;In' this arran ment', the transmitting sta-' :tio n A is insta led as follows;

.The .distant control transmitter, Fig. 2, is constituted by a field having two poleie'ces 51, 52 and the vcoils 53, 54 supplied y the ships circuit E. The armature 55 of said transmitter comprises a continuous winding provided with a commutator cooperating with two brushes connected to the points 56 and 57 of the variable voltage circuit F, A set of three brushes 58, 59, 60 is movable about the said armature the brushes being connected to the wires leading tothe setof contact brushes 61 bearing upon the cylinder of the switch 2 or permutator, and the latter serves to connect the operative transmitter with the circuit D.

As set forth in the above-mentioned French patent, a transmitter of this type will send into the line connected to the three brushes 58, 59, 60 a three-phase current of variable frequency, which latter depends sto ping and control of rection b 1 against th'e gear66h The terminals solely uponthe speed of rotation of the three brushes.

trolled by a shaft 62 actuatingl I disc 63 adapted to connect the aft either with. a gear wheel 64 actuated by ,an elevating 66 driven by a controlled receiver 67.

According to the above-mentioned patent, the said receiver consists of a stator coml- 1 three equidistant points 68, 69,70'with -the three 'supplywires for threehase c'ontrol' prising a continuous winding connected at whichar'e connected to the distant control circuit D at 71," 72, 73. v

74 of an electre magnet 75, which is slid;- able on the shaft '62 but is revolublc with the sam said core being controlled by a winding 75.. A spring 74" bearin upon a fixed, support 7 urges the ice-63 of said The set of brushes is con a clutch.

The clutch disc .63 is secured to the core hand wheel 6501- -with agear wheel winding are connected to the two brushes} 76 0f thegeneral permutat0r'2, said brushes beinglflconnected to the air of brushes 77 whic areconnected to t e circuit E at/78, when the brnshesffil are distantcontr'ol circuit; D. For a given position of the tent control. transmitters, transmitter 1 of station A,

But these} other? transmitters jhavethfe'iir .arinaturesl '53- always' 'suppliedfby continw ous' c'urre'nt by tinueto rotate. tor-s67! 5 {remain in constantconnection with position as well as the position of themtatmgbrushes58?, .59, 60 which -they"control iwill constantly;

depend I transmitter. one t the-control: b

etc. since the transmitter'of 'thei sueonce to change ove from I station A to the controlbyia'm'ither station seeding station is situa'tedht cafch instant n} tlile positioncorresponding to the aiming o t e,

electro-magnet is energized; thepe in suitable position, the clutch member 63 which rotates with the shaft 62' engages the lower pinion secured to the operatinghand wheel 65 and is disenga from th motor 67.. the stations other than the o rative station A are in engagement wi their con trolled-motor 67c i All the clutch discs'of i .connectedtc the the-circuit Disfsup lied by'one ot'the' disji 1 forexamp'le tha r the othertransmltters being cut 'Oiffrom th o 3 .1

the circuit -Fyandthus con- Furthermore all. themeupon the "positinnfof th em g pieces. .At'this moment; whenv the v In the arrangement shewn in 2' and 2, the shaft 62 of the set of movable brushes of the distant control transmitter is secured to the control pointer 80 of the dial 81 disposed at the station A, said pointer being connected to the pointer .82 of a like dial 83.mounted' at the firing station and indicatmg' the firing elements. The dial.83

has a second pointer 84 operated directly from this station and connected to the re ceiving pointer 85 mounted on the dial 81. The firing ofiicer places the pointer 8 1 upon the proper scale division for the firing element which he is to transmit, and the pointer 85 reproduces this indication on the dial S1 in view of the gunner occupied with the hand wheel 05 of the distant control system and the latter will operate the wheel so as to hold the control-pointer in coincidence with the order pointer At the firing ofiiccris station, the repeating pointer 82 reproducing the motion of the control pointer 80 should coincide with the order pointer 84 The shaft 02 may be actuated directly by the movement of the sight glass for aiming in direction. thereby eliminating the gunner at the wheel 65. An example of this case will be further set forth.

In order that the motion of the cannon may be entirely dependent in time and space upon the motion of the distant control hand wheel 65, the main motor 22 must be capable of operating the cannon at the same speed and with the same acceleration as are used for the said hand wheel.

But the speed and the acceleration which can he given to a cannon of a stated moment of inertia by a motor of a certain power are comprised within exact limits, and in order that the distant control device and the cannon should move in coincidence, the said control device should not receive a speed or acceleration which may be superior respectively to the speed and the acccleration which the motor of the power may communicate to the cannon.

To obtain this result, one of the two following devices can be used.

1Tl1e speed and acceleration given by the gunner aiming the piece are limited in a positive manner by employing suitable resistance and inertia effects which are opposed to his action. Fig. 5 shows an arrangement of this kind wherein the apparatus at the control station is mounted upon a revoluble base 86 upon which are disposed the gunners seat 87 and his sight glass 88 for aiming in direction. The handwheel 89 for the distant control for aiming in direction actuates the shaft 90 driving. the set of movable brushes f the distant control transmitter 91 and also a shaft 92 which (through the pinion 93) operates a rack 9-1 whereby the said base can be turned. The gunncrs effort in operating his wheel 89 will depend upon the resistance and the inertia of the said revolving base, and these factors are so calculated that in normal operation the gunner shall not be able to exceed the limits of speed and acceleration corresponding to the maximum speed and acceleration which can be given to the cannon by the main motor 22. This gives the assurance that the cannon will remain under the control of the hand wheel 89 and that' its driving motor 22 will not be called upon for an excessive effort.

2-The distant control station may comprise an outfit analogous to that of the cannon, so as to provide for the similarity of the movements (speed, acceleration) by using a suitable ratio between (a) the power of the motor controlling the motion of the station, (1)) the moment of inertia, and (c) the mechanical resistances of the station.

This latter arrangement differs from the former only by the substitution of the electric motor for the force of the gunner.

In all cases in which the aiming in direction is to be corrected, the following means will be used (Fig. 5). If the correction is to be made as a lateral allowance. the field 95 of the distant control transformer 91 has at the exterior a toothed ring engaging a worm 96 actuated by the hand wheel 97 used for the lateral allowances: rotations of the said field will vary the direction of the field flux by a corresponding amount with respect to the instantaneous position of the set through a like angle. and it thus corresponds to a like angular correction of the controlled receivers.

If a correction for the parallax is to be added to the lateral allowance or correction the worm 96 is actuated by a differential which gives the algebraic sum of the allowance'and the parallax. If different corrections are to be given to the various pieces of artillery, the distant control transmitter 91 will have as many field elements 95 and armature elements 98 placed in sequence on the same axis as there are cannon in use, and all the sets of revoluble brushes of all the armatures will be mounted on a common shaft actuated by the driving shaft 90; the various fields 95 are operated in an independent manner and will have a different angular spacing, so that the diflerent cannon will receive the proper correction in each case.

The machine station, Fig. 3 is disposed as follows. A motor 100 with constant voltage and variable speed is connected at 101, 102 to the ships circuit E. The exciting circuit 103 includes a field rheostat 104. The said motor is coupled to a variable voltage generator 105 supplying (at 106. 107) the variable voltage line F; the field circuit of said generator includes the rheostat 109. A motor 110 is supplied from the two points 111, 112 of the line F through a reversing and switching device 113. In Order that the voltage variations in the circuit F of the generator 105 shall follow the speed variations of the aiming wheel 65 (Fig. 1) pertaining to distant control sysloo llii

1,ase,ue

tem, a controlled motor is disposed at 114 which is connected to the distant control line D at 115, 116, 117. The controlled motor 114 on the one hand (operatin at the same speed as the distant contro transmitter and the motor on the other hand (which being supplied by the variable voltage line F will rotate at a speed which is at all times pro rtional to the volta e) will act upon a di erential whose resulting motion provides for the stopping and for the startin (in the desired sense) of the motor 110 y means of the switch 113, as well as for the regulating of the field rheostat 104 of the motor 100 and the rheostat 109 of the variable voltage generator 105. The said differential is constructed as follows. The rotor 118 of the controlled motor 114 actuates by the worm 119 a worm wheel 120 secured to the up r gear wheel 121 of the differential; in ii e manner the armature shaft of the motor 110 actuates by the worm 122 a worm wheel 123 secured to the lower gear wheel 124 of the differential whereof the planetary gear 125 are mounted on a shaft 126 u n which are disposed: (1) the arm 127 of the reversing and switc ing device 113, (2) the arm 128 of the old rheostat 109, (3), the arm 129 of the field rheostat 104. The operation of the said differential has been above described with reference to Fig. 1.

The receiving station C is disposed as follows, Figs. 4 and 4'. The cannon platform is actuated by the main motor 130 which is supplied by the variable voltage line F at the points 131132. The field 133 of saidmotor 130 is connected to the ships circuit E at 134, 135. The cannon is operated by the worm gear 136, 137 engaging the rack 138 of the cannon platform. Between the motor 130and the worm 136 is mounted an electro-magnetic clutch 139, 140 supplied by the ships circuit at the points 141, 142. v

As above stated, the main controlling motor 130, which is supplied by the variable voltage line F depending upon the opera-.

tion of the hand wheel of the distant control device 65, will rotate at a speed-do nding substantially upon the operation 0 said hand wheel; any differences are corrected by a motor 143 which is under the exact control of the circuit D to which it is connected at the points 144,v 145, 146. A differential is actuated on the one hand by the motor 143 and on the other hand by the motion of the cannon itself; the movement of the differential is used to control the motor 130 as to the-stopping, the startin in either direction and the regulation an in this manner the said motor will be placed under a very exact control.

For this purpose, the rotor of the controlled motor 143 actuated by the worm 147 a worm-wheel 148 mounted upon a sleeve 149 carrying the two planetary are 150; 1n like manner, a rack 151 upon t e cannon platform actuates by means of a pinion 152 and the worm gearing 154, 153 a shaft 155 which (through a magnetic clutch 156, 157) carries the outer disc 158 of the planetary ear set. The central pinion 159 of the p anetary gear set is mounted on the shaft 160 upon which are disposed the various elements for the control of the motor 130 for starting, stopping and field regulatlon. The starting of the motor in either direction is obtained by means of two cams'161, 162 acting respectlvely upon a pivoted lever 161', 162 having at the end a contact piece (161" or 162") connected with the wires 163, 164 supplying the armature of the motor 130; the contact pieces 161", 162" can be brought simultaneously into contact with the set 165-166 or the set 167168, which are connected to the line F at 131, 132, so as to supply the armature of the motor 130 in either irection.

The field 133 of the'motor 130 is regulated by means of an arm 169 mounted on the shaft 160 and co-operating with a stationary disc 170 provided with contact pieces connected with a resistance 171 mounted in the said field circuit of the main control motor 130. To the shaft 160 is also keyed the cam .172 employed at the endof the stroke; when the cannon has rotated through a certain angle in either direction, the said cam will break the supply circuits of the two magnetic clutches 139, 140 and 156, 157 which are respectively connected to the ship's circuit at 141, 142 and 142' whereby the cannon is connected on the one" hand with the motor 130 and on the other with the differential.

The shaft 160 also carries two cams 173, 174 forming part of a device for limiting the field of fire; it serves to stop the motor 130 when the cannon attains the limits of the field such as are stipulated by the dis position of the cannon on board. The said device is constructed as follows:

The controlled motor 143 is supplied as stated by the distant control circuit D at 144, 145, 146. One phase for example 144 is connected to a lever 175 bridging two conducting sectors 176, 177; the wires 178, 179 are respectively connected to said sectors and to the movable contacts 173', 174' mounted upon the lovers actuated by the cams 173,- 174; the movable contacts 173', 174' co-operate respectively with the fixed contacts 17 17 which are connected together by a wire 180 connected with the above-mentioned phase of the controlled motor 143. The arm 175 of the device for limiting the stroke is actuated by an auxiliary controlled motor 181 (used as a motor low the motion of the cannon; As lon for aiming at a distance) which is connectedtothe distant control circuit D at 182, 183, 184. Each of the two conducting sectors 176, 177 is terminated by unequal insulating port'ions 185, 186 and 187, 188 respectively, which are disposed in contrary sense upon the two sectors; in this manner when the arm 175. reaches the end of its right orleft hand stroke it is now in contact with only one of the two sectors, and this sector will be difierent for the right or the left hand position.

The operation of the said device for limiting the field of firing is as follows. When the cannon attains the limit of the firing field, for instance on the right hand side, the arm 175 reaches its right hand limiting position at 175' and is no longer in contact with the sector 177 but remains in contact with the sector 176. The motion of the cannon actuating the difi'erential shaft 160 and the cam 174 will break the circuit at 174', 174" which was the only one supplied through the sector 176 this will break the circuit of the phase 180 of the controlled motor 143, thus stopping the main operating motor 130.

When the hand wheel of the distant control device is turned inthe other direction. the arm 175-'whichhas been in constant motion by means of its auxiliary motor 191 will now return to the left, and at a given moment it will make contact with the conducting part ofthe sector 177. From this time onward, since the contact at 173', 173' of the earn 173'is closed, the third phase of thecontrolled motor 143 will begin to besupplied by the wire 179, and the motor is again started." It. should be observed that the-cannon will automatically assume the proper position corresponding to the position of t ehand wheel 65, without any angular diflerence.

The dial 189 of the arm is also provided with apointer 190 actuated by a shaft 191 whichv is.- driven by the shaft of the pinion 152, and said pointer will thus folas the arm L'Iti'and pointer 390 are in comcidence, one may be sure that the complete control has been effected. In case of damage to the 'motor used for the electric distant control. the two pointers will become separated by a certain angle, and this will operate an electric bell 192, so that the gunner stationed at the cannon is notified that he should proceed with hand control as indicated by the pointer 175 actuated by the auxiliary controlled motor 181 which thus serves "as a motor for aiming at a distance. He will cut oil the current from the third phase of the controlled motor 143 by the switch 193 placed in the circuit 141-172, Hand control is efl'ectedby the hand wheel 194 which actuates (through the intermedition and at the transmitting station, an elecabsence ary of the shaft 195) the shaft of the worm gear 136, 137 which drives the rack 138 The gunner is required to maintain the pointer 190 and the arm 175 in coincidence. What I-claim isz. 1. An electric distant control system comprising in combination, atransmitting slation and at the transmitting station, an electric distant control'transmitter; a generating station, at the generating station means for varying the voltage of the generating station, an electric motor fed by the generating station and a distant receiver controlled 'by the said transmitter and o crating the said means for varying the v0 tage of the generating station; a receiving station, at the receiving station, a motor fed by the generating station; means for starting in either direction, stopping and regulating the speed of the said second motor; a distant receiver controlled by the transmitter and operating the said means.

2. An electric distant control system comprising in combination: a transmitting sta' trio distant control transmitter; a generating station; at the generating statiommeans for varying thevoltage of the generating station; an electric motor fed by the generating station and a distant receiver controlled by the said transmitter controlling the speed of the said motor and operatingythe means for varying the voltage ofthe generating station;-several receiving stations; at each receiving station a motor fed by the gen-V crating station; means for starting in either directions, stopping and regulating the speed of the said second motor; a distant re ceiver controlled by the transmitter and operatingthe said means.

3. An electric'distant control system comprisin in combination an electric distant contro tions; at each transmitting station an electric distant transmitter; feeding. the electric distant circuit an operating element for the transmitter an electric distant receiver fed by the distant control circuit; and a' clutching device between the transmitterand the receiver andtheoperating element;

a generating station; at the. generating station means for varying the voltage of the generating station; an electric motor fed by the generating station and a distant receiver' fedby the control circuit and operat ing the means for varying the voltage of the generating station; a receiving station; at the receiving station a motor fed by the generating station; means for starting in either directions, stopping and regulating the speed of the said second motor; a distant receiver fed by the electric distant circuit and operating the said means.

4. An electric distant control s'ystem comprising an electric distant control'circuit; sevl circuit; several transmitting sta-- ing device between the so eiementelectric distant control circuit; transmitting stations; at .each transmitting station a crating station; at the eral transmitting stationsat each transmitgzfilstation an electric distant transmitter 'ng the distant control circuit; an operatfor the transmitter; an electric distant'receiver fed b the said control cm cuit; and a clutching evicebetween the said transmitter and the receiver and the operating element; a generating station; at the generatin station means for varying the voltage 0 the trio motor fed'by the generating station and a distant receiver controlled by the said control circuit 0 rating the means for varying the voltage 0 the generating station; several receiving stations; at each receiving station a motor fed by the v nerating station; means for starting in ,ei er direction, stopp'mg and controlling thesaid motor, a recemer fed bythe electric control circuit and operating the said means.

5. In a distant electric control system an several transmitter feeding the electric distant control circuit;.an operating element for the transmitter; an electric. distant receiver fed by the said circuit; and a clutch transmitter and the the operating element; a n ,sta on means for varymg thevo tagefof e gener+ ating station; an; electric motorjfed by the generatin station and: a; distant receiver controlled by the said control circuit and receiver and rating the means for thevolta'ge' o "thegenera'tingstatiom'arecu station at; the receiving station a motor fed by the generating station for startin either direction, stogping and-regutheifspee'd of the sai second motor; t receiver fed by the electric control circuit and operating said means; a permutation connecting electrically to the vdistant control circuit the. transmitter of any one of the transmitting stations, and actuatthe clutching device of the transmitting tation, I

r 6. In a distant electric control system, an'

electric distant control 1 circuit; several transmitting stations at each transmitting station a transmitter ceding the electric distant control circuit; an operatindg element for'the transmitter; an electric istant rece'iver .fed by the said=."control circuit, and a clutching device between the transmitter and the receiverand'the operating element;

' a generating station; at the generating station means for varying the voltage of the nerating station; amelectric motor fed. by, fie generating station and a distant receiver contro'lled by the said control circuit and. .o the means forvarying the voltage *6 the generating station; several receiving Blip-tion a motor.

' the coutrol'circuitand operating the lai jmfiations at each ted by the station;"meana.for

generating station an' elecseveral transmitting stations; at each transmitting station amotor provided with a collector; "movable brusheson the collector connected to the control circuit; the whole constituting a transmitter; operating element for the revoluble (brushes; anv electro-synchronous .vmotor .fed by the said circuit and constituting the distant receiver; and i a clutching" device between the transmitter and the" receiver and the operating element, a generating station; at the generating station a motor 'fedby the generating station;

an anti-synchronous motor fed'by the con-' trolling circuit. and operating the means for varymg the. voltage of the generat' station; several receiving stations, at eac receiving station, a motor fed by the said generating station; means for starting in either directions, stopping and regulating the speed of the said second motor; an autosynchronous motor fed, by the control circuit, constituting-the receiver and the said means; I e

8. In an electric distant, control system, a distant controlcir'cuit; a transmi sta- 'tion; at the transmi station an ectric distant tri smitter f, 'thetfiontrol cirwit; a eratingstation; at e generating statifiii ia motor generator group; a field rheostat for "the motorof the group; an excitation rheostat' for the'generator of the group; a distant receiver'fed by the distant controlcircuit; a motor fed by the generator; a switch for the starting in either direction and the St PPi f t e said second motor actuated by adi erential actuated by the second motor andthe receiver and actuating the said switch, the said field rheostat and the said excitation rheostat; arecei station; at the receiving station a motor, f g by the generating station; means for startingineither directions, stopping and. regulating the speed of the said second motor; a distant receiver fed b 'the electriceontrol circuit. and o rati t c said means. 9; In an eectric t control system 'a distant control circuit; a transmi station;- at the transmitting stationan ectlic' I distant transmitter feeding the 'saidcontrolcircuit; :h genelsz'lating.f station; means for varying e vo ge o e generating station; an electric motor fed by the generating station and a distant receiver controlled b operatmg- III means for varying the voltage of the norating station; a receiving station; at t e receiving station a motor fed by the nerating station; a field rheostat for t e said motor; a switch for starting in either direction the said motor; a receiver fed by the control circuit; a differential actuated by the motor and the receiver and openti the field rheostat of the motor, md'tho flit Switch. 10

In witness whereof I hon hereunto Id my'hand.

ELIE GRLNAT. 

